vhost: vringh: use get_user()/put_user() for IOTLB 16-bit accesses

getu16_iotlb() and putu16_iotlb() use __get_user() and __put_user() when
the IOTLB maps to user virtual addresses.  Nothing nearby checks the
translated address: that relies on the mapping having been validated
against the user's VMAs when it was set up.

Use get_user() and put_user(), which do the same single, untorn access
and also check the address.  The only atomic-context use, the vdpa
simulators' notification check, now disables page faults around it, so
the might_fault() in the checked accessors stays quiet there.

This is part of getting rid of __get_user() and __put_user() entirely.

Tested-and-acked-by: Michael S. Tsirkin <mst@redhat.com>
Fixes: 42823a871fd4 ("vringh: support VA with iotlb")
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

0 files changed, 0 insertions, 0 deletions